It is still an unusual idea to carry out a surgical repair for partial tears, whereas if the hamstring muscles
have completely torn away it is generally becoming accepted practice that surgery is the appropriate treatment.
The subjects were then instructed to contract their hip flexors intentionally once every 2 s so that their hip joints flexed while keeping their knees extended so that their right leg swung up to the anterior aspect of their body and their right hamstring muscles
were stretched (Figure 2B).
All interrater reliability for multiparametric MR imaging measures was excellent in the quadriceps femoris and the hamstring muscles
. ICC was as follows: T1 value ranged from 0.758 to 0.975; T2 value ranged from 0.842 to 0.994; T2* value ranged from 0.763 to 0.963.
The cut-off values of the AKE and the PKE test for the detection of short hamstring muscle
flexibility were calculated based on the normal distribution approach (95% of the population was accepted as normal).
Based on the above data, there is significant difference between the values of modified Thomas test which is done during pre- and post-test shows there is increase in length of iliopsoas muscle, after the intervention of CRAC, also there is significant difference between the values of Sit and Reach test which is done pre and post-test shows there is increased length of hamstring muscle
. The combined effect of the above two mechanisms has reduced the intensity of pain, in low back region, that has been reflected in the significant value exists between pre- and post-test values of VAS.
The second mechanism of injury occurs when the hamstring muscle
is stretched beyond its available range of motion or load tolerance.
The effects of static stretch duration on the flexibility of hamstring muscles
. African JBiomed Res.2006; 8: 79-82.
The hip extensors, mainly for hamstring muscles
, during the late swing phase showed peak positive and negative powers at 3996 [+ or -] 1120 and -1606 [+ or -] 781W, respectively.
The majority of strength training exercises in the rehabilitation program were aimed at targeting the quadriceps muscles, with the hamstring muscles
contracting actively as antagonists (knee extension) or synergists (hip extension).
Duration of static stretching influences muscle force production in hamstring muscles
. J Strength Cond Res.
This biarticular anatomy sometimes means that the hamstring muscles
are stressed heavily over two joints simultaneously, as in contracting eccentrically at the hip and knee while lengthened in terminal swing phase of running (20, 21).
In humans, inadequate flexibility is a contributing factor for muscular injuries, especially concerning hamstring muscles
(Best et al., 1994).